Finding the Fourth Proportional to 1,087.89, 1,501.93 and 715.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.89 : 1,501.93 = 715.52 : x
2. Step 2: Convert to fraction form
   1,087.89/1,501.93 = 715.52/x
3. Step 3: Cross multiply
   1,087.89x = 1,501.93 × 715.52
4. Step 4: Simplify right side
   1,087.89x = 1,074,660.95
5. Step 5: Solve for x
   x = 1,074,660.95/1,087.89
6. Step 6: Final answer
   x = 987.84